204881 has 4 divisors (see below), whose sum is σ = 206064. Its totient is φ = 203700.

The previous prime is 204871. The next prime is 204887. The reversal of 204881 is 188402.

204881 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188402 = 2 ⋅94201.

It is a cyclic number.

It is not a de Polignac number, because 204881 - 2¹⁰ = 203857 is a prime.

It is a super-2 number, since 2×204881² = 83952448322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (51516).

2²⁰⁴⁸⁸¹ is an apocalyptic number.

It is an amenable number.

204881 is a deficient number, since it is larger than the sum of its proper divisors (1183).

204881 is an equidigital number, since it uses as much as digits as its factorization.

204881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 204881 is about 452.6378243143. The cubic root of 204881 is about 58.9522739579.

The spelling of 204881 in words is "two hundred four thousand, eight hundred eighty-one".